Without our first, we're mealy grains. Without our second, we dangle. Without our third, a forum's banes. Without our fourth, we strangle. Without our fifth, we're almost beat, But all together, we're fleet!

Small, shrunken No longer serving the purpose I once did. I'm still here though. A remnant of what I was.

Forwards, I'm a pair of holes as black as deepest night Backwards, I'm a whoopsie, biff, mistake to be set right

A deadly duel at this command Transition from a deck to hand Donating blood for those in need Ability of Pot of Greed

Take away my second, and I’m a crunchy main ingredient in a lunch menu item. Or the last name of an eighties dancing man, who may need to tighten a body part. As a whole, I’m something that’s used as a signal for directing or warning. I’m usually quite bright!